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net/smc: fix documentation of buffer sizes

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Since commit 833bac7ec3 ("net/smc: Fix setsockopt and sysctl to
specify same buffer size again") the SMC protocol uses its own
default values for the smc.rmem and smc.wmem sysctl variables
which are no longer derived from the TCP IPv4 buffer sizes.

Fixup the kernel documentation to reflect this change, too.

Fixes: 833bac7ec3 ("net/smc: Fix setsockopt and sysctl to specify same buffer size again")
Signed-off-by: Gerd Bayer <gbayer@linux.ibm.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Link: https://lore.kernel.org/r/20231030170343.748097-1-gbayer@linux.ibm.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Gerd Bayer 2023-10-30 18:03:43 +01:00 committed by Paolo Abeni
parent 8ffbd1669e
commit a1602d7490
1 changed files with 2 additions and 4 deletions
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6
Documentation/networking/smc-sysctl.rst
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@ -44,18 +44,16 @@ smcr_testlink_time - INTEGER
wmem - INTEGER
Initial size of send buffer used by SMC sockets.
The default value inherits from net.ipv4.tcp_wmem[1].
The minimum value is 16KiB and there is no hard limit for max value, but
only allowed 512KiB for SMC-R and 1MiB for SMC-D.
Default: 16K
Default: 64KiB
rmem - INTEGER
Initial size of receive buffer (RMB) used by SMC sockets.
The default value inherits from net.ipv4.tcp_rmem[1].
The minimum value is 16KiB and there is no hard limit for max value, but
only allowed 512KiB for SMC-R and 1MiB for SMC-D.
Default: 128K
Default: 64KiB